Hot-water furnace.



No. 860,725. I PATENTED JULY 23,- 1907. H. L. BRUCE.

HOT WATER FURNACE. urmuumn FILED r23 18. 1907.

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PATENTED JULY 23, 1907.

H. L. BRUGE.

HOT WATER FURNACE.

APPLICATION nun IBB'. 19. 1901.

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UNITED STATES HARRY L. BRUCE, OF PORTLAND, OREGON.

HOT-WATER FURNACE.

Specification of Letters Patent.

Patented July 23, 190?- Application filed February 18, 1907- er NO- 358,155-

To all whom it may concern:

Be it known that I, HARRY L. BRUCE, a citizen of the United States, and a resident of Portland, in the county of-Multnomah and State of Oregon, have invented a new and useful Improvement in Hot-Water Furnaces, of which the following is a specification, reference being had to the accompanying drawings as constituting a part thereof.

This invention has for its object to so arrange the coils of my furnace as to constitute a series of fuel receptacles themselves, arranged above the grate bars upon which the main portion of the fuel is fed, and the fuel contained within the basket-shaped coils of pipe being merely intended to supplement the main body of the fuel and to serve to bring the heat, due to the combustion, in closer contact with and to hold the same upon the coils of pipe.

I attain my object by the arrangement of the parts of my furnace as illustrated in the drawings above referred to, in which,

Figure 1 is a front View of my heating furnace, with parts broken away so as to show the interior basketlike arrangement of the coils of pipe to be filled with supplemental fuel; Fig. 2 is a plan section of my furnace showing a top View of such supplemental fuelbaskets; and Fig. 3 is a partial bottom view of such supplemental fuel-baskets.

The numerals designate the parts referred to.

The body, 1, of the furnace is provided with an ash pit covered by a door 2, and a main furnace chamber covered by a door 3, and having grate bars and being otherwise arranged as usual. Above the main furnace there is provided by me a supplemental chamber to contain a multiple of heating coils, arranged to constitute fuel-baskets, 4, 4. Supposing my furnace to be intended as a hot-water furnace, the upper ends 5 of the pipe coils would be connected with a larger pipe 6, commonly termed a header, and the latter is connected with the house main; and the lower, or return end 7 of the pipe-coils is connected with a similarly arranged header 8, also connected with the house main, and thus establishing the required circulation. The circulating pipes are coiled into a plurality of individual, inverted truncated cones, which I shall term supplemental fuel baskets; that is to say, such baskets widening upward, and the piping at the bottom of such baskets being so arranged as to provide a SllfllClGIll] closure therefor to retain the coke or other fuel with which the baskets are filled. Furthermore the inleading pipes 5 of the respective baskets are so arranged as to serve as grate bars on which to retain the supplemental fuel, and allow the same to be banked over the tops of the fuel baskets. In the construction of the fuel baskets two or three pipes are coiled side by side to give the baskets the proper shape and bring about the described effects. I find it expedient to divide the upper header-pipe 6, assuring thereby a better circulation. I prefer to use coke as the supplemental fuel, with which the baskets 4 are to be filled. The baskets are individually filled, and then the fuel is banked over all of them, so as to cover well the tops of the same. A good fire is then started, on the main grate bars, the heat of which will shortly set the coke in the baskets to glowing, and by so doing bringing the heat generated into immediate contact with the surface of the coils of pipe through which the heated-water is circulating. The result is that much less fuel will be consumed on the whole to thoroughly and rapidly heat the circulating water than if the main furnace had to be depended upon to do all the work.

I claim:

1. A furnace of the class referred to, comprising a inain furnace chamber, a superimposed supplemental-chamber, and a plurality of heating-coils of pipe, located in said supplemental-chamber, and through which the fluid to be heated is circulated, each of such heating-coils being arranged in the form of a basket, adapted to hold supplemental fuel, and whereby live coals may be held in imme diate contact with the surface of said heating coils of pipe.

2. In a furnace of the class referred to, the combination of a main furnace chamber, a superimposed supplementalchamber. and a plurality of heating-coils of pipe, located in said supplementahchamber. and through which the fluid to be heated is circulated, each of such heating-coils being arranged in the form of'a basket, adapted to hold supplemental fuel, and whereby live coals may be held in imme- (liate contact with the surface of said heating coils of pipe.

3. A furnace of the class referred to, comprising a main furnace chamber, a superimposed supp]emental-chaniber, and a plurality of heating-coils of pipe, located in said supplementabchamber, and through which the fluid to be heated is circulated, each of said coils being arranged in the form of a basket, the bottom pipe-ends thereof being arranged to form a closure for the bottom of the coils, and the upper pipe-ends thereof being arranged to serve as grate-bars, spanning the spaces between contiguous coils and on which the fuel filling the heating coils may be banked, and whereby live coals may be held in immediate contact with the surface of such heating-coils of pipe.

I. In a furnace of the class referred to, the combination of a main furnace chamber, a superimposed supplemental chamber, and a plurality of heating-coils of pipe located in said supplemental-chamber, and through which the fluid to be heated is circulated, each of said heating-coils being arranged in the form of a basket, the bottom pipeends thereof being arranged to form a closure for the bottom of the coils, and the upper pipe-ends thereof being arranged to serve as grate-bars, spanning the spaces between contiguous coils and on which the fuel filling the heating coils may be banked, and whereby live coals may be held in immediate contact with the surface of such heatingcoils of pipe.

HARRY L. BRUCE.

Witnesses Z. .T. Gnrsnnn, CECIL LONG. 

